Fix #757 indentation of "\in" #57

Fix #757 indentation of "\in"

Usage Workflow file

9 errors and 3 warnings

failed 1/2 proof-check-correct-stat (0.804656 sec)

failed 1/13 goals-after-auto (0.288227 sec)

failed 2/13 goals-after-comment (0.169205 sec)

failed 3/13 goals-after-error (0.184885 sec)

failed 4/13 goals-after-proof (0.170599 sec)

failed 8/13 goals-reset-qed (0.172765 sec)

failed 11/13 goals-up-to-date-at-error (0.191016 sec)

failed 12/13 goals-updated-after-check-many-steps (0.220270 sec)

failed 13/13 goals-updated-after-search-many-steps (0.198492 sec)

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v2. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Failed to remove 'http.https://github.com/.extraheader' from the git config